CN108067044A - Defogging equipment - Google Patents
Defogging equipment Download PDFInfo
- Publication number
- CN108067044A CN108067044A CN201610990958.9A CN201610990958A CN108067044A CN 108067044 A CN108067044 A CN 108067044A CN 201610990958 A CN201610990958 A CN 201610990958A CN 108067044 A CN108067044 A CN 108067044A
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- Prior art keywords
- riser
- rectification
- outer barrel
- defogging equipment
- gas
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- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims 2
- 239000007788 liquid Substances 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 24
- 238000000926 separation method Methods 0.000 abstract description 20
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000001133 acceleration Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 96
- 239000012071 phase Substances 0.000 description 12
- 239000003595 mist Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000004581 coalescence Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a kind of defogging equipments, and including several demisting components arranged side by side, each demisting component includes riser and outer barrel, and outer barrel is arranged on the outside of riser；The riser is divide into upper part and lower part vertically, and top is divided into riser I, and lower part is divided into riser II, riser I and riser II and is connected by bearing；Rectification passage is uniformly arranged on the circumference of riser I；Riser II is fixed on tower tray, and less than tower tray certain distance, riser II tower trays set several air inlet deflectors to be uniformly provided with several air admission holes on the circumference of lower part on the riser II inner walls of air inlet position for the bottom of riser II.The defogging equipment of the present invention by rectification, acceleration and shaving effect of the fluid in flow process, realizes the separation of drop and gas.The defogging equipment of the present invention is simple in structure, and pressure drop is small, less scaling, easy for installation, reduces entrainment, can effectively realize gas-liquid separation.
Description
Technical field
The present invention relates to a kind of gas-liquid separation equipment, especially a kind of defogging equipment.
Background technology
Substantial amounts of SO is generated in the production process of the industries such as electric power, metallurgy, petrochemical industry2With the harmful substances such as dust, bring
Serious acid rain harm and haze weather are the atmosphere pollutions of the current priority control in China.At present, field of Environment Protection generally uses
Wet desulfurizing process removes the harmful substances such as the sulfur dioxide in flue gas, i.e., sprays lye to flue gas so as to absorb or adsorb this
A little harmful substances.With a large amount of grain sizes it is about 10~60 micro- in the flue gas after the desulfurization of absorption tower however, in process of wet desulphurization
The fine drop of rice, dissolved with sulfuric acid, sulfate, SO in these drops2Deng, atmospheric environment can not only be polluted, while
More serious corrosion and fouling are caused to follow-up equipment.When therefore, using wet desulfurizing process, cleaned gas is leaving suction
Demisting is had to before receiving tower, and demister is depended on the step for demisting to complete.
Demister is generally located at the top of absorption tower, when the gas containing mist passes through demister with certain speed, meeting
Bump against with demister internal structure, and depend in its surface.Mist on demister internal structure surface, by spreading and again
The effect of power can progressively be assembled, and after weight reaches certain level, will be separated from demister internal structure, so as to real
Existing gas-liquid separation.When demister in the process of running because fouling due to resistance drop is caused to increase to predetermined value when, it is necessary to start anti-
Cleaning procedure is rinsed demister, generally, is both needed to set flooding nozzle in demister inlet end and exhaust end, at this time may
Cause serious entrainment of the gas phase to liquid phase, cause gas phase band liquid.
Common demister has mesh mist eliminator, collapser demister, rotational flow plate defroster etc..Although mesh mist eliminator energy
General mist is separated, but requires mist cleaning, air-flow velocity smaller, and resistance drop is big, service life is short, and equipment investment is big.
Demister generally all uses horizontally disposed at present, and demister gas flow direction is vertical with silk screen, when gas velocity is relatively low, the mist of entrainment
Foam inertia is small, drifts in gas, it is impossible to silk screen making contact and be removed, and due to by separation drop and gas phase in inverse
Stream flow direction, gas are also easy to produce reentrainment to drop, so that gas-liquid separation efficiency reduces, and mesh mist eliminator also has appearance
The problems such as easily blocking, pressure drop is big.The folding that direction is different, shape is different is installed inside blade type, herringbone demister
Flowing plate to form small runner, increases defogging effect, structure is more complicated, and separating effect is bad.Rotational flow plate defroster is by separating liquid
Drop is identical with gas flow, is also easy to produce reentrainment, reduces demisting efficiency, and pressure drop is big, and energy consumption is higher.
The demister element that CN200410014713.X is introduced is made of baffle plate and flue gas flow field adjustment block, and baffle plate is fixed
In flue gas flow field adjustment block, the density and shape of baffle plate change according to the flow area variation of flow field parameter everywhere, from
And the flow area of air-flow in absorption tower is made to be evenly distributed, but still do not break away from drop descent, gas-liquid counter current is existing
As being also easy to produce reentrainment.
The demister that CN200920128824.1 is introduced is made of cooler, coarse defogging device and smart demister etc., coarse defogging
Device is corrugated sheet or demisting plate, and smart demister is steel wire, which changes traditional demister drop and airflow direction is inverse
The shortcomings that stream flowing, improve demisting efficiency.But the demister structure is more complicated, makes difficulty, and as a result of silk screen
Structure, demister pressure drop is larger, is also easier to block.
A kind of straight tube shape deflector type demister that CN203724892U is introduced is made of several demisting components, each demisting
Component includes riser and outer barrel, and the circumference of riser is provided with several seams, is set on the riser circumference close to each item seam
Groove and the tangential flow guiding wing are equipped with, the tangential flow guiding wing plays guide functions, gas flow is made to change.It is being flowed over by fluid
Multiple baffling in journey realizes the separation of drop and gas, can effectively remove the smaller drop of grain size, demisting efficiency is higher.But
After gas flows through the tangential flow guiding wing, gas direction still compares diverging, not enough concentrate, and gas velocity reduce, then with outer tube inner wall
Impact force is smaller during collision, influences defogging effect.The demister, which relies primarily on baffling, changes gas direction, and then gas is with consolidating
Body wall face collides so as to fulfill gas-liquid separation, preferable for larger drop defogging effect but unknown for droplet effect
It is aobvious, and the demister structure is more complicated, the easy fouling in gap between riser and the tangential flow guiding wing.
US7618472B2 provides a kind of vane-type demister, and the demister is by structures such as corrugated sheet, tablet and louver boards
Into, and form many cavitys or runner.After gas-liquid mixture enters demister, fluid course shifts so that fluid flows to
Changed for several times, and velocity variations obtain very fast, and liquid phase is easy to separate from gas phase.The technology liquid phase and gas phase point
From in the process, can realizing gas liquid cross-flow, therefore gas phase substantially reduces the reentrainment effect of drop, but the technical pattern
Extremely complex, difficulty of processing is also bigger, and corresponding processing and fabricating expense is higher.
The content of the invention
In view of the deficiencies of the prior art, it is whole in flow process by fluid the present invention provides a kind of defogging equipment
Stream, acceleration and shaving effect, realize the separation of drop and gas.The defogging equipment of the present invention is simple in structure, and pressure drop is small, is not easy to tie
Dirt, it is easy for installation, entrainment is reduced, can effectively realize gas-liquid separation.
The defogging equipment of the present invention includes several demisting components arranged side by side, and each demisting component is including riser and outside
Cylinder, outer barrel are arranged on the outside of riser, preferably with riser on the same axis；The riser is divided into up and down vertically
Two parts, top are divided into riser I, and top, which is set, covers plate, and lower part is divided into riser II, and bottom sets lower capping plate, rises
Tracheae I is connected with riser II by bearing；Several rectification passages are uniformly arranged on the circumference of riser I, rectification passage edge rises
The tangential direction of tracheae I outer walls is horizontal embedded, and side wall I and riser I tube wall of the rectification passage close to outer barrel one side are tangent, another
Side wall II intersects with riser I tube walls, and rectification channel roof is flushed with upper capping plate, and bottom is intersected with riser I tube walls, each whole
Circulation road direction of rotation is identical；Riser II is fixed on tower tray, and the bottom of riser II is less than tower tray certain distance, rise gas
Pipe II tower trays are set on the riser II inner walls of air inlet position into conductance with being uniformly provided with several air admission holes on the circumference of lower part
Flowing plate；The air inlet deflector is axially disposed within air inlet bore edges along riser, is connected by connector with riser inner wall.
In the defogging equipment of the present invention, the rectification passage generally sets 1 ~ 12, preferably 4-8.Rectification passage
Wall thickness is preferably identical with the wall thickness of riser I.
In the defogging equipment of the present invention, the length l of rectification passage is the length of side wall II, and width w is rectification passage both sides
Maximum horizontal range between wall, maximum normal distances of the height h between rectification channel roof and bottom；Wherein length l is width w
2 ~ 5 times, be preferably 3 ~ 4 times；The cross sectional shape of rectification passage is rectangle, ellipse, circle, it is trapezoidal or semicircle etc. in one
Kind or several combinations, one or more of preferably rectangular, oval or circular combination.The size of rectification passage is according to reality
Operating mode or design requirement, determined by those skilled in the art, the height h of such as rectification passage is generally 20~
600mm is preferably 100~300mm；The width w of rectification passage is generally 10~200mm, is preferably 20~100mm.Rectification is led to
The total sectional area in road is 0.2 ~ 0.9 times of riser I cross-sectional areas, is preferably 0.3 ~ 0.6 times of riser I cross-sectional areas.
The present invention defogging equipment in, the side wall II ends of the rectification passage can be flushed with riser I inner walls or
Certain distance m inside riser I is extend into, m is 0.1 ~ 0.9 times of length l, is preferably 0.3 ~ 0.6 times.When the side of rectification passage
When wall II ends are flushed with riser I inner walls, rectification channel bottom end is also flushed with riser I inner walls；When rectification passage
When side wall II extend into certain distance m inside riser I, rectification channel bottom end is flushed with side wall end.
In the defogging equipment of the present invention, the air admission hole generally sets 3 ~ 12, preferably 4-8.The section of air admission hole
Shape is rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, preferably rectangular, oval or circle
The combination of one or more of shape.The total sectional area of air admission hole is 0.6 ~ 1.5 times of riser II sectional areas, preferably 0.8 ~ 1.2
Times, specific size is determined according to actual operating mode or design requirement by those skilled in the art.
In the defogging equipment of the present invention, upper and lower two mid point of curve line institutes in air admission hole and riser II outer wall intersections
The angle of the section of the riser outer wall done and the air inlet deflector plane close to air admission hole one side is γ, and γ is 10 ° ~ 60 °, excellent
Select 20 ° ~ 35 °.
In the defogging equipment of the present invention, the rotation direction of each air inlet deflector is identical with rectification passage, the shape of air inlet deflector
Can be rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, preferably the shape phase with air admission hole
Together, air inlet water conservancy diversion plate suqare is 1.1 ~ 2 times, preferably 1.3 ~ 1.5 times of air inlet hole area.
In the defogging equipment of the present invention, lower capping plate（Riser II bottoms）It is 60 to have certain distance K, distance K away from tower tray
~200mm is preferably 80~120mm.
In the defogging equipment of the present invention, it is 60~300mm that rectification channel bottom has certain distance A, distance A apart from tower tray,
Preferably 80~120mm.
In the defogging equipment of the present invention, it is 20~200mm that there are certain distance C, distance C in bearing bottom with tower tray, is preferably
40~80mm.
In the defogging equipment of the present invention, riser II and tower tray airtight connection, the diameter and tower of riser I and riser II
The percent opening of disk can be determined according to actual operating mode or design requirement by those skilled in the art.
In the defogging equipment of the present invention, the lower capping plate can weld together with riser II or global formation,
Rectification passage, upper capping plate and riser I can weld together or global formation.
In the defogging equipment of the present invention, the outer barrel is cylinder, and outer barrel diameter D is the 1.5-6 of riser II diameters d
Times, it is preferably 2-3 times.The upper edge of outer barrel be higher by riser I on along certain distance P, distance P be rectification channel height h 1~
8 times, be preferably 2~5 times.The lower edge of outer barrel has certain distance B apart from tower tray, and less than the lower edge of rectification passage, outer barrel lower edge
Distance B away from tower tray is 5~100mm, is preferably 20~50mm.The overall height H of outer barrel is the 2.5~10 of rectification channel height
Times, it is preferably 3~5 times.
In the defogging equipment of the present invention, the inner surface of the outer barrel sets groove and/or protrusion.Protrusion or groove with it is outer
The axis of cylinder is parallel or can form an angle with axis.The groove or the section of protrusion can also be rectangle, triangle
The suitable shapes such as shape or circle.
In the defogging equipment of the present invention, the inner surface of the outer barrel is preferably provided with the recessed of cross sectional shape as shown in Figure 5
Slot, the section of the groove are made of a circular arc and straight line section；The intersection point of wherein circular arc and outer tube inner surface circumference is distinguished
Do the tangent line of circular arc and circumference, the angle between tangent line is α, and α is 5 ° ~ 70 °, is preferably 10 ° ~ 40 °；Circular arc and straightway intersection point
The tangent line for the circular arc that place is done and the angle of straightway are β, and β is 30 ° ~ 110 °, is preferably 45 ° ~ 90 °.The depth Z of groove, i.e.,
Circular arc is 0.1 ~ 0.7 times of outer barrel wall thickness with the beeline on straightway intersection point to outer tube inner surface circumference, preferably 0.3 ~
0.5 times；Arc length between the intersection point and straightway of circular arc and outer tube inner surface circumference and the intersection point of outer tube inner surface circumference is outer barrel
The 1/80 ~ 1/6 of inner surface circumference.
In the defogging equipment of the present invention, the lower ending opening of the outer barrel can also set toothing or waveform knot
Structure drips so as to be more conducive to the liquid isolated from the inner wall of outer barrel into continuous flow.
The junction of each component of defogging equipment of the present invention ensures sealing, does not generate gas leak phenomenon.
The defogging equipment of the present invention, during work, the gas of entrained drip from the air admission hole of tower tray lower end in the horizontal direction into
Enter riser II, gas phase flow direction is changed to tangential direction by radial direction after running into air inlet deflector, is conducive to gas along liter
Tracheae II inner walls, which spiral, to be flowed up, and enhances eddy flow effect.Partial drop collides with air inlet deflector in the process,
Some droplets is made to adhere on air inlet deflector and coalescence, the drop of attachment becomes larger, a part of larger drop its from
The gravity that body generates is more than the climbing power of gas and when making a concerted effort of surface tension of liquid, and drop will be along under air inlet baffle surface
Fall to be separated, that is, complete first time gas-liquid separation；The larger drop of another part then continues to flow with gas, edge
Riser II and riser I inner wall disc spins flow up.When the gas of entrained drip rises in riser, capping is run into
Gas phase flow direction changes again after plate, part droplet and upper capping plate collision, and then completes second of gas-liquid separation；
There is part droplet coalescence to become larger drop again simultaneously, and continue to flow with gas.The gas of entrained drip is along level or closely
Enter rectification passage like horizontal direction, since rectification passage has certain length, and rectification passage total sectional area is less than riser
Cross-sectional area, the gas of the more dispersed entrained drip of script directional velocity, after rectification passage is entered, directional velocity is changed to edge
The direction of rectification passage, directional velocity comparison rule and concentration, and since circulation area reduces, make the gas of entrained drip into
Speed increases after entering rectification passage.When the directional velocity of the gas of entrained drip changes, partial drop is sent out with rectification vias inner walls
Raw collision, and be attached in rectification vias inner walls, and then constantly flowed through the gas blowout rectification passage of rectification passage and fallen,
Complete third time gas-liquid separation.Meanwhile in rectification passage, since the gas velocity direction of entrained drip changes, the small liquid in part
It drops under inertia force effect and mutually collision occurs, droplet aggregation is as big drop, and the gas stream of entrained drip is rectified logical
Speed increases during road, exacerbates the movement of drop, improves the probability that droplet mutually collides, droplet is made to be easier to be gathered into
For big drop, and rectification passage is flowed out with larger speed with gas.The gas of the entrained drip flowed out from rectification passage
With larger speed, directional velocity compares concentration, and the drop carried secretly is bigger, and continuation collides with outer tube inner wall, then
The secondary flow direction for changing gas, i.e., the gas of entrained drip is by being changed to the circumference along outer tube inner wall along rectification channel direction
It flows in direction.It is flowed up since the gas velocity of entrained drip is larger, and along reeded outer tube inner wall rotation is opened up, because
This can generate obvious shaving effect.The shaving effect refers to that the high-speed gas of entrained drip are revolved along outer tube inner wall
Turn when flowing up, drop is constantly thrown toward outer under the action of inertia force, and drop enters groove and along the circular arc in groove
Duan Yundong since angle α is 5 ° ~ 70 °, can make the arc surface that drop continues on groove do and smoothly move, drop is indirect
Tactile aggregation becomes larger, until running into, straightway is hindered, assembles the drop to become larger and is hit strongly with straightway wall surface, and is attached to
On the straightway of outer tube inner wall groove, drop continues to assemble and become larger, and then goes downstream along outer tube inner wall；And gas then continues
It keeps flowing up along outer tube inner wall rotation at a high speed, realizes gas-liquid separation, and reduce entrainment for the 4th time.And it carries secretly
The gas of drop from outlet rectification passage flow out when, under the impetus of gas, riser I by connect bearing occur turn
Dynamic, the rotation direction of riser I is oppositely oriented with outlet rectification passage, makes continuous from the gas after the outflow of outlet rectification passage
It hits outer barrel inner circumferential wall everywhere, without being merely to hit outer tube inner wall fixed position, strengthens shaving effect, while also more have
It is uniformly distributed beneficial to gas in outer barrel.By above-mentioned rectification, acceleration and shaving effect, fluid is made to realize liquid in flow process
Drop and the separation of gas.
Application of the defogging equipment of the present invention in the absorption tower using wet desulfurizing process generally enters the gas of riser
Speed is 3-20m/s, and the gas velocity of rectification channel outlet is 10-40m/s, and the gas velocity of rectification channel outlet is the gas velocity into riser
1.5 ~ 3 times.
Compared with prior art, defogging equipment of the invention has the following advantages：
1st, there are lower capping plate in riser II lower ends, and the circumferencial direction of riser II is uniformly provided with several air admission holes, air inlet position
Riser II inner walls set several air inlet deflectors, after gas is made to enter riser II in the horizontal direction, run into air inlet deflector
Gas phase flow direction is made to be changed to tangential direction by radial direction, be conducive to gas along riser II and riser I inner walls spiral to
Upper flowing enhances eddy flow effect.
2nd, connected between riser I and riser II by bearing, riser I rotates under the action of gas, rises
The rotation direction of tracheae I is oppositely oriented with outlet rectification passage, makes continuously to hit from the gas after the outflow of outlet rectification passage
Outer barrel inner circumferential wall everywhere, without being merely to hit outer tube inner wall fixed position, strengthens shaving effect, is more favorable to simultaneously
Gas is uniformly distributed in outer barrel.
3rd, rectification passage has certain length, and the gas of the more dispersed entrained drip of script directional velocity is whole entering
After circulation road, directional velocity is changed to along the direction of rectification passage, directional velocity comparison rule and concentration；And rectification passage is always cut
Area is less than riser cross-sectional area, since circulation area reduces, the gas of entrained drip is made to enter speed increasing after rectification passage
Add.The section of cylinder inner surface groove is made of a circular arc and straight line section, and the high-speed gas of entrained drip are along outer barrel
When wall rotation flows up, drop is constantly thrown toward outer under the action of inertia force, and drop enters groove and along groove
Arc section moves, and since angle α is 5 ° ~ 70 °, the arc surface that drop continues on groove can be made to do smooth movement, until
Run into straightway it is hindered after go downstream along outer tube inner wall, and without dead zone exist.
4th, by multistage demisting, efficiently achieve the effect that demisting, effectively remove the smaller liquid of grain size carried secretly in gas
Drop, demisting efficiency is high, reduces the harm to environment, plays the role of environmental protection.
5th, gas flow uniform, flow resistance is small, and resistance reduces.
6th, it is simple in structure, it is easy to make, it is not easy to plug and fouling, without backwash.
7th, water-saving result is good, and the moisture removed from the gas of entrained drip can reduce water consumption with recycling.
Description of the drawings
Fig. 1 is the defogging equipment structure diagram of the present invention.
Fig. 2 is the schematic cross-section of air admission hole and air inlet deflector.
Fig. 3 is the schematic cross-section for the defogging equipment that rectification passage is flushed with inner wall.
Fig. 4 is the schematic cross-section for the defogging equipment that rectification passage stretches into un-obstructed draft tube interior.
Fig. 5 is that section is the groove schematic diagram that circular arc and straightway are formed.
In figure respectively mark for：1- tower trays；2- riseies I；3- rectification passages；4- outer barrels；Plate is covered on 5-；6- grooves；7-
Air inlet deflector；8- air admission holes；Plate is covered under 9-；10- bearings；11- riseies II.
Specific embodiment
The defogging equipment of the present invention is described in further detail with reference to the accompanying drawings and examples.
The defogging equipment of the present invention includes several demisting components arranged side by side, and each demisting component is including riser and outside
Cylinder 4, outer barrel 4 is arranged on the outside of riser, preferably with riser on the same axis；The riser is divided into vertically
Lower two parts, top are divided into riser I2, and top, which is set, covers plate 5, and lower part is divided into riser II11, and bottom sets lower capping
Plate 9, riser I2 are connected with riser II11 by bearing 10；Several rectification passages 3 are uniformly arranged on the circumference of riser I2,
The tangential direction of rectification passage 3 along riser I2 outer walls is horizontal embedded, and rectification passage 3 is close to the side wall I of 4 one side of outer barrel and liter gas
Pipe I2 tube walls are tangent, and another side wall II intersects with riser I2 tube walls, and the top of rectification passage 3 is flushed with upper capping plate 5, bottom and
Riser I2 tube walls intersect, and each 3 direction of rotation of rectification passage is identical；Riser II11 is fixed on tower tray 1, riser II11's
Bottom be less than 1 certain distance of tower tray, riser II11 tower trays 1 to be uniformly provided with several air admission holes 8 on the circumference of lower part, into
Air inlet deflector 7 is set on the riser II11 inner walls at stomata 8；The air inlet deflector 7 is axially disposed within along riser
8 edge of air admission hole is fixedly connected by connector with riser inner wall.
In the defogging equipment of the present invention, the rectification passage 3 generally sets 1 ~ 12, preferably 4-8.Rectification passage 3
Wall thickness it is preferably identical with the wall thickness of riser I2.
In the defogging equipment of the present invention, the length l of rectification passage 3 is the length of side wall II, and width w is 3 liang of rectification passage
Maximum horizontal range between side wall, height h are the maximum normal distance between 3 top and bottom of rectification passage；Wherein length l is width
Spend w 2 ~ 5 times are preferably 3 ~ 4 times；The cross sectional shape of rectification passage 3 is rectangle, ellipse, circle, it is trapezoidal or semicircle etc. in
One or more combination, one or more of preferably rectangular, oval or circular combination.The size root of rectification passage 3
The factually operating mode or design requirement on border, is determined by those skilled in the art, and the height h of such as rectification passage 3 is generally
20~600mm is preferably 100~300mm；The width w of rectification passage 3 is generally 10~200mm, is preferably 20~100mm.It is whole
The total sectional area of circulation road 3 is 0.2 ~ 0.9 times of riser I2 cross-sectional areas, be preferably riser I2 cross-sectional areas 0.3 ~
0.6 times.
In the defogging equipment of the present invention, the side wall II ends of the rectification passage 3 can be flushed with riser I2 inner walls
Or certain distance m inside riser I2 is extend into, m is 0.1 ~ 0.9 times of length l, is preferably 0.3 ~ 0.6 times.When rectification passage 3
Side wall II ends when being flushed with riser I2 inner walls, 3 bottom end of rectification passage is also flushed with riser I2 inner walls；Work as rectification
When the side wall II of passage 3 extend into certain distance m inside riser I2,3 bottom end of rectification passage is flushed with side wall end.
In the defogging equipment of the present invention, the air admission hole 8 generally sets 3 ~ 12, preferably 4-8.Air admission hole 8 is cut
Face shape is rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, it is preferably rectangular, oval or
The combination of one or more of circle.The total sectional area of air admission hole 8 is 0.6 ~ 1.5 times of riser II11 sectional areas, preferably 0.8
~ 1.2 times, specific size is determined according to actual operating mode or design requirement by those skilled in the art.
In the defogging equipment of the present invention, two mid point of curve connect up and down in air admission hole 8 and riser II11 outer wall intersections
The section for the riser outer wall that line is done and the angle of 7 plane of air inlet deflector close to 8 one side of air admission hole are γ, γ for 10 ° ~
60 °, preferably 20 ° ~ 35 °.
In the defogging equipment of the present invention, the rotation direction of each air inlet deflector 7 is identical with rectification passage 3, the shape of air inlet deflector 7
Shape can be rectangle, ellipse, circle, trapezoidal or one or more of semicircle etc. combination, the preferably shape with air admission hole 8
Identical, 7 area of air inlet deflector is 1.1 ~ 2 times of 8 area of air admission hole, preferably 1.3 ~ 1.5 times.
In the defogging equipment of the present invention, lower capping plate 9（Riser II11 bottoms）There are certain distance K, distance K away from tower tray 1
It is preferably 80~120mm for 60~200mm.
In the defogging equipment of the present invention, 3 distance from bottom tower tray 1 of rectification passage has a certain distance A, distance A for 60~
300mm is preferably 80~120mm.
In the defogging equipment of the present invention, it is 20~200mm that there are certain distance C, distance C in 10 bottom of bearing with tower tray 1, preferably
For 40~80mm.
In the defogging equipment of the present invention, riser II11 and 1 airtight connection of tower tray, riser I2 are straight with riser II11's
The percent opening of footpath and tower tray 1 can be determined according to actual operating mode or design requirement by those skilled in the art.
In the defogging equipment of the present invention, the lower capping plate 9 and riser II11 can weld together or integral into
Type, rectification passage 3, upper capping plate 5 can weld together with riser I2 or global formation.
In the defogging equipment of the present invention, the outer barrel 4 is cylinder, and 4 diameter D of outer barrel is riser II11 diameters d's
1.5-6 times, be preferably 2-3 times.The upper edge of outer barrel 4 be higher by riser I2 on along certain distance P, distance P is high for rectification passage 3
Spend h 1~8 times is preferably 2~5 times.The lower edge of outer barrel 4 has certain distance B apart from tower tray 1, and less than under rectification passage 3
Edge, distance B of 4 lower edge of outer barrel away from tower tray 1 are 5~100mm, are preferably 20~50mm.The overall height H of outer barrel 4 is rectification passage 3
2.5~10 times of height are preferably 3~5 times.
In the defogging equipment of the present invention, the inner surface of the outer barrel 4 sets groove 6 and/or protrusion.Protrusion or groove 6
It is parallel with the axis of outer barrel 4 or can form an angle with axis.The groove 6 or the section of protrusion can also be square
The suitable shapes such as shape, triangle or circle.
In the defogging equipment of the present invention, the inner surface of the outer barrel 4 is preferably provided with the recessed of cross sectional shape as shown in Figure 5
Slot 6, the section of the groove 6 are made of a circular arc and straight line section；The wherein intersection point point of circular arc and 4 inner surface circumference of outer barrel
Do not do the tangent line of circular arc and circumference, the angle between tangent line is α, and α is 5 ° ~ 70 °, is preferably 10 ° ~ 40 °；Circular arc is handed over straightway
The tangent line of circular arc and the angle of straightway that point place is done are β, and β is 30 ° ~ 110 °, are preferably 45 ° ~ 90 °.The depth Z of groove 6,
I.e. circular arc and the beeline on straightway intersection point to 4 inner surface circumference of outer barrel are 0.1 ~ 0.7 times of 4 wall thickness of outer barrel, are preferably
0.3 ~ 0.5 times；Arc length between the intersection point of the 4 inner surface circumference of intersection point and straightway and outer barrel of 4 inner surface circumference of circular arc and outer barrel
For the 1/80 ~ 1/6 of 4 inner surface circumference of outer barrel.
In the defogging equipment of the present invention, the lower ending opening of the outer barrel 4 can also set toothing or waveform knot
Structure drips so as to be more conducive to the liquid isolated from the inner wall of outer barrel 4 into continuous flow.
The junction of each component of defogging equipment of the present invention ensures sealing, does not generate gas leak phenomenon.
The defogging equipment of the present invention, during work, the gas of entrained drip from the air admission hole 8 of 1 lower end of tower tray in the horizontal direction
Into riser II11, gas phase flow direction is changed to tangential direction by radial direction after running into air inlet deflector 7, is conducive to gas
It spirals and flows up along riser II11 inner walls, enhance eddy flow effect.Partial drop is sent out with air inlet deflector 7 in the process
Raw collision makes some droplets adhere to simultaneously coalescence on air inlet deflector 7, and the drop of attachment becomes larger, a part of larger
Its own gravity generated of drop is more than the climbing power of gas and when making a concerted effort of surface tension of liquid, and drop will be along air inlet water conservancy diversion
7 surface of plate falls to be separated, that is, completes first time gas-liquid separation；The larger drop of another part then with gas after
Afterflow is moved, and is flowed up along riser II11 and riser I2 inner wall disc spins.The gas of entrained drip rises in riser
When, gas phase flow direction changes again after running into capping plate 5, and part droplet is collided with upper capping plate 5, and then is completed
Second of gas-liquid separation；There is part droplet coalescence to become larger drop again simultaneously, and continue to flow with gas.Entrained drip
Gas enters rectification passage 3 along horizontal or level of approximation direction, and since rectification passage 3 has certain length, and rectification passage 3 is total
Sectional area is less than riser cross-sectional area, and the gas of the more dispersed entrained drip of script directional velocity is entering rectification passage 3
Afterwards, directional velocity is changed to along the direction of rectification passage 3, directional velocity comparison rule and concentration, and since circulation area reduces,
The gas of entrained drip is made to enter speed increase after rectification passage 3.When the directional velocity of the gas of entrained drip changes, part liquid
Drop collides with 3 inner wall of rectification passage, and is attached on 3 inner wall of rectification passage, and then is constantly flowed through the gas of rectification passage 3
Body blowout rectification passage 3 simultaneously falls, and completes third time gas-liquid separation.Meanwhile in rectification passage 3, due to the gas of entrained drip
Body directional velocity changes, and mutually collision occurs under inertia force effect for part droplet, and droplet aggregation becomes big drop, and presss from both sides
Speed increases during guttiferous gas stream rectified passage 3, exacerbates the movement of drop, improve droplet mutually collide it is several
Rate makes droplet be easier to assemble as big drop, and with gas with larger speed outflow rectification passage 3.From rectification
The gas for the entrained drip that passage 3 flows out has larger speed, and directional velocity compares concentration, and the drop carried secretly is bigger,
Continuation collides with 4 inner wall of outer barrel, again the flow direction of change gas, i.e., the gas of entrained drip is by along rectification passage
3 directions are changed to the circumferencial direction flowing along 4 inner wall of outer barrel.Since the gas velocity of entrained drip is larger, and along offering
4 inner wall of the outer barrel rotation of groove 6 flows up, therefore can generate obvious shaving effect.The shaving effect, refers to
The high-speed gas of entrained drip along the rotation of 4 inner wall of outer barrel flow up when, drop is constantly thrown toward outer under the action of inertia force
Edge, drop enter groove 6 and are moved along the arc section in groove 6, since angle α is 5 ° ~ 70 °, can continue on drop
The arc surface of groove 6, which is done, smoothly to be moved, and aggregation is contacted between drop and is become larger, straightway is hindered, and aggregation becomes larger until running into
Drop hit strongly with straightway wall surface, and be attached on the straightway of 4 inboard wall groove 6 of outer barrel, drop continues to assemble and become
Greatly, and then along 4 inner wall of outer barrel go downstream；And gas then continues to keep to flow up along the rotation of 4 inner wall of outer barrel at a high speed, the 4th time
Gas-liquid separation is realized, and reduces entrainment.And the gas of entrained drip from outlet rectification passage 3 flow out when, in gas
Under the impetus of body, riser I2 is rotated by connecting bearing 10, and rotation direction and the outlet rectification of riser I2 are led to
Road 3 it is oppositely oriented, make from outlet rectification passage 3 flow out after gas continuously hit 4 inner circumferential wall of outer barrel everywhere, without only
It is to hit 4 inner wall fixed position of outer barrel, strengthens shaving effect, while be more favorable to gas and be uniformly distributed in outer barrel 4.It is logical
Above-mentioned rectification, acceleration and shaving effect are crossed, fluid is made to realize the separation of drop and gas in flow process.
Embodiment one
Certain wet scrubber tower purifying smoke 150000Nm3/ h, wherein aobvious water concentration is 10~15g/Nm3, after demisting of the present invention
Water concentration is shown in exhaust<0.5g/Nm3, demisting efficiency >=95%.
Embodiment two
Certain wet scrubber tower purifying smoke 100000Nm3/ h, wherein aobvious water concentration is 12~16g/Nm3, after demisting of the present invention
Water concentration is shown in exhaust<0.6g/Nm3, demisting efficiency >=95%.
Claims (17)
1. a kind of defogging equipment, including several demisting components arranged side by side, it is characterised in that：Each demisting component includes rising gas
Pipe and outer barrel, outer barrel are arranged on the outside of riser；The riser is divide into upper part and lower part vertically, and top is divided into a liter gas
Pipe I, top, which is set, covers plate, and lower part is divided into riser II, and bottom sets lower capping plate, and riser I passes through with riser II
Bearing connects；Several rectification passages, tangential direction of the rectification passage along riser I outer walls are uniformly arranged on the circumference of riser I
Level is embedded, and side wall I and riser I tube wall of the rectification passage close to outer barrel one side are tangent, another side wall II and riser I tube walls
Intersecting, rectification channel roof is flushed with upper capping plate, and bottom is intersected with riser I tube walls, and each rectification passage direction of rotation is identical；
Riser II is fixed on tower tray, and the bottom of riser II is less than tower tray certain distance, and riser II tower trays are with the circle of lower part
Several air admission holes are uniformly provided on week, air inlet deflector is set on the riser II inner walls of air inlet position；The air inlet water conservancy diversion
Plate is axially disposed within air inlet bore edges along riser, is fixedly connected by connector with riser inner wall.
2. defogging equipment described in accordance with the claim 1, it is characterised in that：The rectification passage sets 1 ~ 12.
3. defogging equipment described in accordance with the claim 1, it is characterised in that：The length l of rectification passage is the length of side wall II, wide
Spend maximum horizontal ranges of the w between rectification passage two side, maximum perpendiculars of the height h between rectification channel roof and bottom away from
From；Wherein length l is 2 ~ 5 times of width w；The cross sectional shape of rectification passage is rectangle, ellipse, circle, trapezoidal or semicircle
One or more of combination.
4. defogging equipment described in accordance with the claim 1, it is characterised in that：The total sectional area of rectification passage is transversal for riser I
0.2 ~ 0.9 times of area.
5. defogging equipment described in accordance with the claim 1, it is characterised in that：The side wall II ends of the rectification passage are with rising gas
Pipe I inner walls flush or extend into certain distance m inside riser I, and m is 0.1 ~ 0.9 times of length l.
6. defogging equipment described in accordance with the claim 1, it is characterised in that：The air admission hole sets 3 ~ 12；Air admission hole
Cross sectional shape is rectangle, ellipse, circle, trapezoidal or one or more of semicircle combination.
7. defogging equipment described in accordance with the claim 1, it is characterised in that：In air admission hole and riser II outer wall intersections up and down
The section for the riser outer wall that two mid point of curve lines are done and the angle of the air inlet deflector plane close to air admission hole one side
For γ, γ is 10 ° ~ 60 °.
8. defogging equipment described in accordance with the claim 1, it is characterised in that：The rotation direction of each air inlet deflector and rectification passage phase
Together.
9. defogging equipment described in accordance with the claim 1, it is characterised in that：The shape of air inlet deflector is rectangle, ellipse, circle
Shape, trapezoidal or one or more of semicircle etc. combination, air inlet water conservancy diversion plate suqare are 1.1 ~ 2 times of air inlet hole area.
10. defogging equipment described in accordance with the claim 1, it is characterised in that：Lower capping plate has certain distance K, distance K away from tower tray
For 60~200mm.
11. defogging equipment described in accordance with the claim 1, it is characterised in that：Rectification channel bottom has certain distance apart from tower tray
A, distance A are 60~300mm.
12. defogging equipment described in accordance with the claim 1, it is characterised in that：There are certain distance C, distance C in bearing bottom with tower tray
For 20~200mm.
13. defogging equipment described in accordance with the claim 1, it is characterised in that：The outer barrel is cylinder, and outer barrel diameter D is liter
1.5-6 times of tracheae II diameters d；The upper edge of outer barrel be higher by riser I on along certain distance P, distance P is rectification channel height
1~8 times of h；The lower edge of outer barrel has certain distance B apart from tower tray, and less than the lower edge of rectification passage, outer barrel lower edge is away from tower tray
Distance B is 5~100mm；The overall height H of outer barrel is 2.5~10 times of rectification channel height.
14. defogging equipment described in accordance with the claim 1, it is characterised in that：The inner surface of the outer barrel set groove and/or
Protrusion.
15. defogging equipment described in accordance with the claim 1, it is characterised in that：The inner surface of the outer barrel sets cutting for groove
Face is made of a circular arc and straight line section；The intersection point of wherein circular arc and outer tube inner surface circumference does circular arc and circumference respectively
Tangent line, the angle between tangent line are α, and α is 5 ° ~ 70 °；The tangent line of the circular arc done at circular arc and straightway intersection point and straightway
Angle is β, and β is 30 ° ~ 110 °；The depth Z of groove, i.e. circular arc and the most short distance on straightway intersection point to outer tube inner surface circumference
From 0.1 ~ 0.7 times for outer barrel wall thickness；Circular arc and the intersection point and straightway of outer tube inner surface circumference and outer tube inner surface circumference
Arc length between intersection point is the 1/80 ~ 1/6 of outer tube inner surface circumference.
16. a kind of application of the defogging equipment in using wet desulfurizing process described in claim 1 ~ 15 any claim.
17. according to the application described in claim 16, it is characterised in that：Into riser gas velocity for 3-20m/s, rectification passage
The gas velocity of outlet is 10-40m/s, and the gas velocity of rectification channel outlet is into 1.5 ~ 3 times of the gas velocity of riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990958.9A CN108067044B (en) | 2016-11-11 | 2016-11-11 | Demisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990958.9A CN108067044B (en) | 2016-11-11 | 2016-11-11 | Demisting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108067044A true CN108067044A (en) | 2018-05-25 |
| CN108067044B CN108067044B (en) | 2020-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610990958.9A Active CN108067044B (en) | 2016-11-11 | 2016-11-11 | Demisting device |
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| Country | Link |
|---|---|
| CN (1) | CN108067044B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758850A (en) * | 2019-03-12 | 2019-05-17 | 中国石油大学(北京) | Gas-liquid Coalescence filter core with pre-separation function |
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| CN108067044B (en) | 2020-12-08 |
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